Triangular curvilinear spa shell



FIG. 1 is a perspective view of the triangular curvilinear spa shell.

FIG. 2 is a top view of the triangular curvilinear spa shell.

FIG. 3 is a rear-view of the triangular curvilinear spa shell.

FIG. 4 is a front-view of the triangular curvilinear spa shell; and,

FIG. 5 is a side view of the triangular curvilinear spa shell.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a triangular curvilinear spa shell, as shown and described. 